The Emacs commands for manipulating paragraphs are also on Meta keys.
Move back to previous paragraph beginning
(backward-paragraph).
Move forward to next paragraph end
(forward-paragraph).
Put point and mark around this or next paragraph
(mark-paragraph).
M-{ (backward-paragraph) moves to the
beginning of the current or previous paragraph (see below for the
definition of a paragraph). M-}
(forward-paragraph) moves to the end of the current
or next paragraph. If there is a blank line before the paragraph,
M-{ moves to the blank line.
When you wish to operate on a paragraph, type M-h
(mark-paragraph) to set the region around it. For
example, M-h C-w kills the paragraph around or after
point. M-h puts point at the beginning and mark at the
end of the paragraph point was in. If point is between paragraphs
(in a run of blank lines, or at a boundary), M-h sets
the region around the paragraph following point. If there are
blank lines preceding the first line of the paragraph, one of
these blank lines is included in the region. If the region is
already active, the command sets the mark without changing point,
and each subsequent M-h further advances the mark by
one paragraph.
The definition of a paragraph depends on the major mode. In Fundamental mode, as well as Text mode and related modes, a paragraph is separated each neighboring paragraph another by one or more blank lines—lines that are either empty, or consist solely of space, tab and/or formfeed characters. In programming language modes, paragraphs are usually defined in a similar way, so that you can use the paragraph commands even though there are no paragraphs as such in a program.
Note that an indented line is not itself a paragraph break in Text mode. If you want indented lines to separate paragraphs, use Paragraph-Indent Text mode instead. See Text Mode.
If you set a fill prefix, then paragraphs are delimited by all lines which don’t start with the fill prefix. See Filling.
The precise definition of a paragraph boundary is controlled
by the variables paragraph-separate and
paragraph-start. The value of
paragraph-start is a regular expression that should
match lines that either start or separate paragraphs (see
Regexps). The value of
paragraph-separate is another regular expression
that should match lines that separate paragraphs without being
part of any paragraph (for example, blank lines). Lines that
start a new paragraph and are contained in it must match only
paragraph-start, not
paragraph-separate. For example, in Fundamental
mode, paragraph-start is
"\f\\|[ \t]*$", and
paragraph-separate is "[ \t\f]*$"
.